<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>css3动画</title>
    <style>
        body {
            position: relative;
            align-items: center;
            min-height: 100vh;
            background-color: rgb(118, 218, 255);
            overflow: hidden;
        }
        
        body:before,
        body:after {
            content: "";
            position: absolute;
            left: 50%;
            min-width: 300vw;
            min-height: 300vw;
            background-color: #fff;
            animation-name: rotate;
            animation-iteration-count: infinite;
            animation-timing-function: linear;
        }
        
        body:before {
            bottom: 15vh;
            border-radius: 45%;
            animation-duration: 10s;
        }
        
        body:after {
            bottom: 12vh;
            opacity: .5;
            border-radius: 47%;
            animation-duration: 10s;
        }
        
        @keyframes rotate {
            0% {
                transform: translate(-50%, 0) rotateZ(0deg);
            }
            50% {
                transform: translate(-50%, -2%) rotateZ(180deg);
            }
            100% {
                transform: translate(-50%, 0%) rotateZ(360deg);
            }
        }
        
        h2 {
            position: relative;
            color: #333;
            z-index: 10;
            text-align: center;
            height: 100vh;
            line-height: 140vh;
            font-size: 8vw;
            text-shadow: 3px 3px 2px #999;
        }
    </style>
</head>

<body>
    <h2>Pure Css Wave</h2>
</body>

</html>